3M SAFETY EAR MUFFS 3M H510A
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Examining the ear piece it appears just thin plastic and foam, I don't know how item is engineered but I have to say it is effective in shielding high frequency noise but allowing low frequency so you can hear someone talking to you. I am very sensitive to powerful machine noise and high dBs, to prevent ear pain I have to wear defenders even just hoovering at home.
Examining the ear piece it appears just thin plastic and foam, I don't know how item is engineered but I have to say it is effective in shielding high frequency noise but allowing low frequency so you can hear someone talking to you. I am very sensitive to powerful machine noise and high dBs, to prevent ear pain I have to wear defenders even just hoovering at home.
Aceimy
10. September 2017
